Carburetor



June 4, 1935.

G. F. HODGES ET AL CARBURETOR Original Filed Feb. 23, 1952 Jew" zz 0d es M QW ZMOEZZZQ" BY mymraa ATTORNEY/ Patented June 4, 1935 PAT ENT OFFICE CARBURETOR George ii. Hodges and Fernando B. (iota, San Diego, Calif.

Application February 23, 1932, Serial No. 594,755 Renewed April 12, 1934 4;- Claims.

This invention relates to carburetors especially adapted for use in connection with generators of burners utilizing gasoline and like fuel and has for its primary object, the provision of a device which will deliver to a generator and burner thereof a combustible mixture which will readily ignite at the burner and produce a blue flame with maximum heat, thereby obviating the customary practice of pre-heating or priming the generator in order to start burning of the fuel at the burner.

' Another object of this invention is the provision of a device of the above stated character which may be easily attached to, an air pressure actuated fuel supply and the generator of a burner so that the liquid fuel received from the supply may be mixed with air under pressure taken from the supply to produce a combustible mixture for the burner prior to the generator functioning to provide the burner with proper fuel.

With these and other objects in'view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter 'more fully described and claimed.

For a complete understanding of our invention, reference is to be had to thefollowing description and accompanying drawing, in which Figure 1 is a top plan view illustrating a car- 30 buretor constructed in accordance with our invention.

a Figure 2 is a sectional view taken on' the line 2-2 of Figure 1. Figure 3 is an and elevation illustrating a carburetor detached from the fuel supply.

Figure 4 is an enlarged detail sectional view illustrating the mixing chamber within the carburetor.

Referring in detail to the drawing, the numeral I indicates a supply tank for gasoline or like fuel and which is placed under air pressure in any suitable manner. The outlet port of the tank I has a carburetor 2 attached thereto and which is constructed in accordance with our invention. The outlet end of the carburetor is suitably connected to the generator of a burner designed for using gasoline or similar fluids as a fuel. To start the conventional type of generator functioning it is customary to pre-heat the same in a suitable manner so that the fuel therein will be vaporized and pass to the burner for ignition and to eliminate the necessity of priming the generator our carburetor is employed and consists of a body 3 in which is formed a mixing passage or chamber 4 communicating at one end with a passage 5 and the other end communicating with a nipple 6 adapted for attach- .ment to the ordinary generator of a burner. One end of the passage 5 is in communication with the interior of the tank while the other end is 5 in communication with an auxiliary or air passage l which communicates with the mixing chamber or passage 4 as clearly shown in Figure 2. A control valve 8 of the needle type is carried by the body for controlling the passing of air 10 between the passages 5 and I and is provided with a finger piece 9 whereby the valve may be adjusted relative to its seat for controlling the amount of air from the passage 5 to the passage 1. An indicator I0 is carried by the finger piece 15 9 and operates over a suitable scale on the body. The outlet of the mixing chamber 4 to the nipple 6 is controlled by a needle valve II having a finger piece I2 whereby said valve may be adjusted relative to its seat for controlling fuel 20 from the mixing chamber to the conventionaltype of generator connected to the nipple 6. A tube I3 is located concentrically of the passage 5 and has angularly related portions I4 and I5. The portion I5 extends downwardly in the tank I 25 to a point in close proximity to the bottom of the tank while the portion I4 extends into the passage or mixing chamber 4 and is supported in spaced relation to the walls thereof by a sleeve IS. The sleeve I6 forms a closure between the mixing 3 chamber 4 and the passage 5 as clearly shown in Figure 2. The free end of the portion I4 of the tube is flared to provide a nozzle I! located within the mixing chamber 4 in advance of the valve II.

The fuel in the tank I under air pressure is forced upwardly through the tube into the mixing chamber and with the valve 8 opened air under pressure from the tank passes upwardly through the passages 5 and 1 into the mixing 40 chamber 4 about the nozzle I I mixing with the fuel and properly vaporizing the same to produce a combustible mixture which passes to the conventional type of generator and the burner thereof when the valve II is opened thus permitting the burner to be ignited with the fuel producing a blue flame with maximum heat and when the generator from the heat from the flame of the burner becomes self-operating, the valve 9 is closed cutting off the supply of air to the mixing chamber 4, thereby conserving the air pressure within the tank I.

While we have shown and described the preferred embodiment of our invention, it will be understood that minor changes in construction.

combination and arrangement of parts may be made without departing from the spirit and scope of our invention, as claimed.

Having thus-described our invention, what we claim is:

1. A carburetor comprising a body having reduced screw threaded ends arranged at right angles to each other with one end threaded into a tank provided with liquid fuel under air pressure and the other end of said body arranged to be threaded to a burner, said body having a mixing chamber extending through the last-named end, a valve for controlling delivery of combustible mixture from the mixing chamber tothe burner, said body having an air passage communicating with the tank to receive air under pressure therefrom, an L-shaped tube arranged in the air passage and the mixing chamber with one end extending into the fuel of the tank and having its other end flared to provide a nozzle spaced from the walls of the mixing chamber and located adjacent the valve, a sleeve mounted on the tube and engaging the walls of the mixing chamber to close the latter to the air passage, said body having a second air passage between the first air passage and the mixing chamber, and a valve controlling the flow of air between the air passages.

2. In a device of the class described adapted for use between a burner to be supplied with a combustible mixture of vaporized liquid fuel and air, and a container for liquid fuel having an air space above the liquid fuel containing air under pressure, said device comprising a body having a mixing chamber therein, the mixing chamber being arranged to communicate with the burner, a fuel passage in said body extending to the mixing chamber and terminating therein in a fuel discharge nozzle having a flared end, an air passage in said body extending to the mixing chamber and terminating behind the flared end of said fuel nozzle, whereby air discharged into the mixing chamber from the air passage impinges upon and annularly envelops the flared end of said nozzle to cause good fuel vaporization, the fuel passage having communication at .its other end i with the container below the fuel level and the air passage having communication with the air space in the container, and a valve for shutting off the air flow through the air passage into the mixing chamber whereby to permit liquid fuel alone to be discharged from the mixing chamber.

3. In a. device of the class described adapted for use between a burner to be supplied with a combustible mixture of vaporized liquid fuel and air, and a container for liquid fuel having an air space above the liquid fuel containing air under pressure, said device comprising a body having a mixing chamber therein, the mixing chamber being arranged to communicate with the burner, a fuel passage in said body extending to the mix-- ing chamber and terminating therein in a fuel discharge nozzle having a flared end, and an air passage in said body extending to the mixing chamber and-terminating behind the flared end of said fuel nozzle, whereby air discharged into the mixing chamber from the air passage impinges upon and annularly envelops the flared end of said nozzle to cause good fuel vaporization, the fuel passage having communication at its other end with the container below the fuel level and the air passage having communication with the air space in the container.

4. In a device of the class described, a vapor generator adapted for supplying vapor to a burner and having means for conducting fuel and air thereto under pressure, the generator comprising ,a body having an enlarged mixing chamber therein, a fuel passage communicating with said chamber, a fuel discharge nozzle extending from said passage into the' chamber and having a flared discharge end substantially concentric with said chamber, an air passage in said body communicating with said chamber behind the flared end of said nozzle, the flared end of said nozzle being enlarged so as to restrict air flow thereby in said chamber and effect fuel vaporization by impingement of air in a thin sheet annularly with respect to the flared end of said nozzle, and a valve for controlling the air flow through the air passage into the mixing chamber.

GEORGE HODGES.

FERNANDO B. COTA. 

